EVAL-AD7274CBZ datasheet, PDF - EEWORLD Datasheet

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EVAL-AD7274CBZ: DescriptionEVAL BOARD FOR AD7274; CategoryDevelopment board/suite/development tools; File Size394KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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EVAL-AD7274CBZ Overview

EVAL BOARD FOR AD7274

EVAL-AD7274CBZ Parametric

Parameter Name	Attribute value
Number of A/D converters	1
Number of digits	12
Sample rate (per second)	3M
Data interface	serial
input range	0 ~ 3.6 V
Power under different conditions (typical values)	11.4mW @ 3 V
IC/parts used	AD7274
What's included	plate

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3 MSPS,10-/12-Bit

ADCs in 8-Lead TSOT

AD7273/AD7274

FEATURES

Throughput rate: 3 MSPS

Specified for V

of 2.35 V to 3.6 V

Power consumption

11.4 mW at 3 MSPS with 3 V supplies

Wide input bandwidth

70 dB SNR at 1 MHz input frequency

Flexible power/serial clock speed management

No pipeline delays

High speed serial interface

SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

Temperature range: −40°C to +125°C

Power-down mode: 0.1 μA typ

8-lead TSOT package

8-lead MSOP package

FUNCTIONAL BLOCK DIAGRAM

AGND

REF

T/H

10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

SCLK

CONTROL

LOGIC

SDATA

DGND

Figure 1.

GENERAL DESCRIPTION

The AD7273/AD7274 are 10-/12-bit, high speed, low power,

successive approximation ADCs, respectively. The parts operate

from a single 2.35 V to 3.6 V power supply and feature

throughput rates of up to 3 MSPS. Each part contains a low

noise, wide bandwidth track-and-hold amplifier that can handle

input frequencies in excess of 55 MHz.

The conversion process and data acquisition are controlled

using CS and the serial clock, allowing the devices to interface

with microprocessors or DSPs. The input signal is sampled on

the falling edge of CS, and the conversion is also initiated at this

point. The conversion rate is determined by the SCLK. There

are no pipeline delays associated with these parts.

The AD7273/AD7274 use advanced design techniques to

achieve very low power dissipation at high throughput rates.

The reference for the parts is applied externally and can be in

the range of 1.4 V to V

. This allows the widest dynamic input

range to the ADC.

Table 1.

Part Number

AD7273

AD7274

AD7276

AD7277

AD7278

Resolution

Package

8-lead MSOP

8-Lead TSOT

8-lead MSOP

8-Lead TSOT

8-lead MSOP

6-Lead TSOT

8-lead MSOP

6-Lead TSOT

8-lead MSOP

6-Lead TSOT

Parts contain external reference pin.

PRODUCT HIGHLIGHTS

1. 3 MSPS ADCs in an 8-lead TSOT package.

2. High throughput with low power consumption.

3. Flexible power/serial clock speed management.

Allows maximum power efficiency at low throughput rates.

4. Reference can be driven up to the power supply.

5. No pipeline delay.

6. The parts feature a standard successive approximation ADC

with accurate control of the sampling instant via a CS input

and once-off conversion control.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

04973-001

AD7273/AD7274

AD7273/AD7274

TABLE OF CONTENTS

Features .............................................................................................. 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

AD7274 Specifications................................................................. 3

AD7273 Specifications................................................................. 5

Timing Specifications .................................................................. 7

Timing Examples.......................................................................... 8

Absolute Maximum Ratings............................................................ 9

ESD Caution.................................................................................. 9

Pin Configurations and Function Descriptions ......................... 10

Typical Performance Characteristics ........................................... 11

Terminology .................................................................................... 14

Circuit Information ........................................................................ 15

Converter Operation.................................................................. 15

ADC Transfer Function............................................................. 15

Typical Connection Diagram ....................................................... 16

Analog Input ............................................................................... 16

Digital Inputs .............................................................................. 16

Modes of Operation ....................................................................... 17

Normal Mode.............................................................................. 17

Partial Power-Down Mode ....................................................... 17

Full Power-Down Mode ............................................................ 17

Power-Up Times......................................................................... 18

Power vs. Throughput Rate....................................................... 20

Serial Interface ................................................................................ 21

Microprocessor Interfacing....................................................... 23

Application Hints ........................................................................... 24

Grounding and Layout .............................................................. 24

Evaluating the AD7273/AD7274 Performance......................... 24

Outline Dimensions ....................................................................... 25

Ordering Guide .......................................................................... 25

REVISION HISTORY

9/05—Revision 0: Initial Version

Rev. 0 | Page 2 of 28

EVAL-AD7274CBZ Related Products

	EVAL-AD7274CBZ	AD7274	AD7274BUJ-REEL
Description	EVAL BOARD FOR AD7274	3MSPS,10-/12-Bit ADCs in 8-Lead TSOT	3MSPS,10-/12-Bit ADCs in 8-Lead TSOT

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